Minor version bump.

CONTRIBUTING.rst

@@ -13,7 +13,7 @@ Types of Contributions
 Report Bugs
 ~~~~~~~~~~~
 
-Report bugs at https://github.com/cuihantao/andes/issues.
+Report bugs at https://github.com/curent/andes/issues.
 
 If you are reporting a bug, please include:
 
@@ -42,7 +42,7 @@ or even on the web in blog posts, articles, and such.
 Submit Feedback
 ~~~~~~~~~~~~~~~
 
-The best way to send feedback is to file an issue at https://github.com/cuihantao/andes/issues.
+The best way to send feedback is to file an issue at https://github.com/curent/andes/issues.
 
 If you are proposing a feature:
 
@@ -97,8 +97,8 @@ Before you submit a pull request, check that it meets these guidelines:
 2. If the pull request adds functionality, the docs should be updated. Put
    your new functionality into a function with a docstring, and add the
    feature to the list in README.rst.
-3. The pull request should work for Python 3.6 and up. Check
-   https://github.com/cuihantao/andes/actions
+3. The pull request should work for Python 3.8 and up. Check
+   https://github.com/curent/andes/actions
    and make sure that the tests pass for all supported Python versions.
 
 ============

andes/io/matpower.py

@@ -272,20 +272,20 @@ def mpc2system(mpc: dict, system) -> bool:
         if (data[8] == 0.0) or (data[8] == 1.0 and data[9] == 0.0):
             # not a transformer
             tf = False
-            ratio = 1
-            angle = 0
+            tap_raio = 1
+            phase_shift = 0
         else:
             tf = True
-            ratio = data[8]
-            angle = data[9] * deg2rad
+            tap_raio = data[8]
+            phase_shift = data[9] * deg2rad
 
         vf = system.Bus.Vn.v[system.Bus.idx2uid(fbus)]
         vt = system.Bus.Vn.v[system.Bus.idx2uid(tbus)]
         system.add('Line', u=status, name=f'Line {fbus:.0f}-{tbus:.0f}',
                    Vn1=vf, Vn2=vt,
                    bus1=fbus, bus2=tbus,
                    r=r, x=x, b=b,
-                   trans=tf, tap=ratio, phi=angle,
+                   trans=tf, tap=tap_raio, phi=phase_shift,
                    rate_a=rate_a, rate_b=rate_b, rate_c=rate_c)
 
     if ('bus_name' in mpc) and (len(mpc['bus_name']) == len(system.Bus.name.v)):

andes/io/psse.py

@@ -402,8 +402,16 @@ def _parse_fshunt_v33(raw, system):
 
 
 def _parse_gen_v33(raw, system, sw):
-    #  0, 1, 2, 3, 4, 5, 6, 7,    8,   9,10,11, 12, 13, 14,   15, 16,17,18,19
-    #  I,ID,PG,QG,QT,QB,VS,IREG,MBASE,ZR,ZX,RT,XT,GTAP,STAT,RMPCT,PT,PB,O1,F1
+    """
+    Helper function for parsing static generator section.
+    """
+
+    # 0,  1,  2,  3,  4,  5,  6,    7,     8,  9, 10, 11, 12,   13,   14,
+    # I, ID, PG, QG, QT, QB, VS, IREG, MBASE, ZR, ZX, RT, XT, GTAP, STAT,
+    #    15, 16, 17, 18, 19, ...,           26,  27
+    # RMPCT, PT, PB, O1, F1, ..., O4, F4, WMOD, WPF
+    # The columns above for v33 is different from the manual of v34.5, which includes two new columns:
+    # `NREG`` at 8 and `BSLOD` before `O1`
 
     mva = system.config.mva
     out = defaultdict(list)
@@ -417,6 +425,7 @@ def _parse_gen_v33(raw, system, sw):
         gen_mva = data[8]
         gen_idx += 1
         status = data[14]
+        wmod = data[26] if len(data) >= 26 else 0
 
         param = {'Sn': gen_mva, 'Vn': vn, 'u': status,
                  'bus': bus, 'subidx': subidx,
@@ -428,6 +437,7 @@ def _parse_gen_v33(raw, system, sw):
                  'v0': data[6],
                  'ra': data[9],   # ra - armature resistance
                  'xs': data[10],  # xs - synchronous reactance
+                 'wmod': wmod,  # generator control mode
                  }
 
         if data[0] in sw.keys():
@@ -443,12 +453,14 @@ def _parse_gen_v33(raw, system, sw):
 
 def _parse_line_v33(raw, system):
     #
+    # 0,1,  2,3,4,5,    6,    7,    8, 9,10,11,12,13, 14,15,16
     # I,J,CKT,R,X,B,RATEA,RATEB,RATEC,GI,BI,GJ,BJ,ST,LEN,O1,F1,...,O4,F4
     #
 
     out = defaultdict(list)
     for data in raw['branch']:
         param = {
+            'u': data[13],
             'bus1': data[0], 'bus2': data[1],
             'r': data[3], 'x': data[4], 'b': data[5],
             'rate_a': data[6], 'rate_b': data[7], 'rate_c': data[8],

andes/models/line/line.py

@@ -3,8 +3,10 @@
 """
 
 import numpy as np
+
 from andes.core import (ModelData, IdxParam, NumParam, DataParam,
                         Model, ExtAlgeb, ConstService)
+from andes.shared import spmatrix
 
 
 class LineData(ModelData):
@@ -241,3 +243,168 @@ def get_tf_idx(self):
         """
 
         return np.array(self.idx.v)[self.istf]
+
+    def build_y(self):
+        """
+        Build bus admittance matrix. Store the matrix in ``self.Y``.
+
+        Returns
+        -------
+        Y : spmatrix
+            Bus admittance matrix.
+        """
+
+        nb = self.system.Bus.n
+
+        y1 = self.u.v * (self.g1.v + self.b1.v * 1j)
+        y2 = self.u.v * (self.g2.v + self.b2.v * 1j)
+        y12 = self.u.v / (self.r.v + self.x.v * 1j)
+        m = self.tap.v * np.exp(1j * self.phi.v)
+        m2 = self.tap.v**2
+        mconj = np.conj(m)
+
+        # build self and mutual admittances into Y
+        self.Y = spmatrix((y12 + y1 / m2), self.a1.a, self.a1.a, (nb, nb), 'z')
+        self.Y -= spmatrix(y12 / mconj, self.a1.a, self.a2.a, (nb, nb), 'z')
+        self.Y -= spmatrix(y12 / m, self.a2.a, self.a1.a, (nb, nb), 'z')
+        self.Y += spmatrix(y12 + y2, self.a2.a, self.a2.a, (nb, nb), 'z')
+
+        return self.Y
+
+    def build_b(self, method='fdpf'):
+        """
+        build Bp and Bpp matrices for fast decoupled power flow and DC power flow.
+
+        Results are saved to ``self.Bp`` and ``self.Bpp`` without return.
+        """
+        self.build_Bp(method)
+        self.build_Bpp(method)
+
+    def build_Bp(self, method='fdpf'):
+        """
+        Function for building B' matrix.
+
+        The result is saved to ``self.Bp`` and returned
+
+        Parameters
+        ----------
+        method : str
+            Method for building B' matrix. Choose from 'fdpf', 'fdbx', 'dcpf'.
+        Returns
+        -------
+        Bp : spmatrix
+            B' matrix.
+
+        """
+        nb = self.system.Bus.n
+
+        if method not in ("fdpf", "fdbx", "dcpf"):
+            raise ValueError(f"Invalid method {method}; choose from 'fdpf', 'fdbx', 'dcpf'")
+
+        # Build B prime matrix -- FDPF
+        # `y1`` neglects line charging shunt, and g1 is usually 0 in HV lines
+        # `y2`` neglects line charging shunt, and g2 is usually 0 in HV lines
+        y1 = self.u.v * self.g1.v
+        y2 = self.u.v * self.g2.v
+
+        # `m` neglected tap ratio
+        m = np.exp(self.phi.v * 1j)
+        mconj = np.conj(m)
+        m2 = np.ones(self.n)
+
+        if method in ('fdxb', 'dcpf'):
+            # neglect line resistance in Bp in XB method
+            y12 = self.u.v / (self.x.v * 1j)
+        else:
+            y12 = self.u.v / (self.r.v + self.x.v * 1j)
+
+        self.Bdc = spmatrix((y12 + y1) / m2, self.a1.a, self.a1.a, (nb, nb), 'z')
+        self.Bdc -= spmatrix(y12 / mconj, self.a1.a, self.a2.a, (nb, nb), 'z')
+        self.Bdc -= spmatrix(y12 / m, self.a2.a, self.a1.a, (nb, nb), 'z')
+        self.Bdc += spmatrix(y12 + y2, self.a2.a, self.a2.a, (nb, nb), 'z')
+        self.Bdc = self.Bdc.imag()
+
+        for item in range(nb):
+            if abs(self.Bdc[item, item]) == 0:
+                self.Bdc[item, item] = 1e-6 + 0j
+
+        return self.Bdc
+
+    def build_Bpp(self, method='fdpf'):
+        """
+        Function for building B'' matrix.
+
+        The result is saved to ``self.Bpp`` and returned
+
+        Parameters
+        ----------
+        method : str
+            Method for building B'' matrix. Choose from 'fdpf', 'fdbx', 'dcpf'.
+
+        Returns
+        -------
+        Bpp : spmatrix
+            B'' matrix.
+        """
+
+        nb = self.system.Bus.n
+
+        if method not in ("fdpf", "fdbx", "dcpf"):
+            raise ValueError(f"Invalid method {method}; choose from 'fdpf', 'fdbx', 'dcpf'")
+
+        # Build B double prime matrix
+        # y1 neglected line charging shunt, and g1 is usually 0 in HV lines
+        # y2 neglected line charging shunt, and g2 is usually 0 in HV lines
+        # m neglected phase shifter
+        y1 = self.u.v * (self.g1.v + self.b1.v * 1j)
+        y2 = self.u.v * (self.g2.v + self.b2.v * 1j)
+
+        m = self.tap.v
+        m2 = abs(m)**2
+
+        if method in ('fdbx', 'fdpf', 'dcpf'):
+            # neglect line resistance in Bpp in BX method
+            y12 = self.u.v / (self.x.v * 1j)
+        else:
+            y12 = self.u.v / (self.r.v + self.x.v * 1j)
+
+        self.Bpp = spmatrix((y12 + y1) / m2, self.a1.a, self.a1.a, (nb, nb), 'z')
+        self.Bpp -= spmatrix(y12 / np.conj(m), self.a1.a, self.a2.a, (nb, nb), 'z')
+        self.Bpp -= spmatrix(y12 / m, self.a2.a, self.a1.a, (nb, nb), 'z')
+        self.Bpp += spmatrix(y12 + y2, self.a2.a, self.a2.a, (nb, nb), 'z')
+        self.Bpp = self.Bpp.imag()
+
+        for item in range(nb):
+            if abs(self.Bpp[item, item]) == 0:
+                self.Bpp[item, item] = 1e-6 + 0j
+
+        return self.Bpp
+
+    def build_Bdc(self):
+        """
+        The MATPOWER-flavor Bdc matrix for DC power flow. Saves results to `self.Bdc`.
+
+        The method neglects line charging and line resistance. It retains tap ratio.
+
+        Returns
+        -------
+        Bdc : spmatrix
+            Bdc matrix.
+        """
+
+        nb = self.system.Bus.n
+
+        y12 = self.u.v / (self.x.v * 1j)
+        y12 = y12 / self.tap.v
+
+        self.Bdc = spmatrix(y12, self.a1.a, self.a1.a, (nb, nb), 'z')
+        self.Bdc -= spmatrix(y12, self.a1.a, self.a2.a, (nb, nb), 'z')
+        self.Bdc -= spmatrix(y12, self.a2.a, self.a1.a, (nb, nb), 'z')
+        self.Bdc += spmatrix(y12, self.a2.a, self.a2.a, (nb, nb), 'z')
+        self.Bdc = self.Bdc.imag()
+
+        for item in range(nb):
+            if abs(self.Bdc[item, item]) == 0:
+                self.Bdc[item, item] = 1e-6
+
+        return self.Bdc

andes/models/static/pv.py

@@ -36,6 +36,19 @@ def __init__(self):
         self.ra = NumParam(default=0.0, info='armature resistance', tex_name='r_a')
         self.xs = NumParam(default=0.3, info='armature reactance', tex_name='x_s')
 
+        # `wmod`: generator model included in PSS/E file; not yet used in ANDES
+        #    0: conventional
+        #    1: renewable standard QT/ QB limits
+        #    2: renewable +, - Qlimits based on WPF
+        #    3: renewable, fixed Qlimit based on WPF
+        #    4: Infeed machine
+        self.wmod = NumParam(default=0,
+                             info='Machine ctrl. mode [PSS/E]',
+                             tex_name=r'w_{mod}',
+                             unit='int',
+                             export=False,
+                             )
+
 
 class PVModel(Model):
     """

andes/routines/eig.py

@@ -103,16 +103,18 @@ def _reduce(self, fx, fy, gx, gy, Tf, dense=True):
         spmatrix
             The reduced state matrix
         """
-        gyx = matrix(gx)
-        self.solver.linsolve(gy, gyx)
+        self.gyx = matrix(gx)
+        self.solver.linsolve(gy, self.gyx)
 
         Tfnz = Tf + np.ones_like(Tf) * np.equal(Tf, 0.0)
         iTf = spdiag((1 / Tfnz).tolist())
 
+        self.fxy = (fx - fy * self.gyx)
+
         if dense:
-            return iTf * (fx - fy * gyx)
+            return iTf * self.fxy
         else:
-            return sparse(iTf * (fx - fy * gyx))
+            return sparse(iTf * self.fxy)
 
     def _reorder(self):
         """

andes/system.py

@@ -1,8 +1,8 @@
 """
-System class for power system data and methods
+System class for power system data and methods.
 """
 
-#  [ANDES] (C)2015-2022 Hantao Cui
+#  [ANDES] (C)2015-2024 Hantao Cui
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by

andes/variables/dae.py

@@ -282,7 +282,7 @@ class DAE:
     +===========+=============================================+
     |  m        | The number of algebraic variables/equations |
     +-----------+---------------------------------------------+
-    |  n        | The number of algebraic variables/equations |
+    |  n        | The number of state variables/equations     |
     +-----------+---------------------------------------------+
     |  o        | The number of limiter state flags           |
     +-----------+---------------------------------------------+

docs/source/conf.py

@@ -125,7 +125,7 @@
 
 html_context = {
     "github_url": "https://github.com",
-    "github_user": "cuihantao",
+    "github_user": "curent",
     "github_repo": "andes",
     "github_version": "master",
     "doc_path": "docs/source",

docs/source/examples/index.rst

@@ -6,9 +6,9 @@ Examples
 A collection of examples are presented to supplement the tutorial. The
 examples below are identical to the Jupyter Notebook in the ``examples``
 folder of the repository
-`here <https://github.com/cuihantao/andes/tree/master/examples>`__. You
+`here <https://github.com/curent/andes/tree/master/examples>`__. You
 can run the examples in a live Jupyter Notebook online using
-`Binder <https://mybinder.org/v2/gh/cuihantao/andes/master>`__.
+`Binder <https://mybinder.org/v2/gh/curent/andes/master>`__.
 
 .. toctree::
    :maxdepth: 2

docs/source/getting_started/install.rst

@@ -112,15 +112,15 @@ from either your fork or the original repository. Clone the repository with
 
 .. code:: bash
 
-    git clone https://github.com/cuihantao/andes
+    git clone https://github.com/curent/andes
 
 .. note::
 
     Replace the URL with yours to use your fork. With ``git``, you can later easily
     update the source code and perform version control.
 
 Alternatively, you can download the ANDES source code from
-https://github.com/cuihantao/andes and extract all files to the path of your
+https://github.com/curent/andes and extract all files to the path of your
 choice. Although works, this method is discouraged because tracking changes and
 pushing back code edits will require significant manual efforts.